Road closureMon, Aug 17, 2026 – Fri, Aug 21, 2026HWY 400 (Southbound)
Nightly Construction on HWY 400 Southbound Express Off-ramp at 401, Toronto.
Road closure · Mon, Aug 17, 2026 – Fri, Aug 21, 2026
★ IMPACT 3/5 · ★ SOURCE-BACKED CLOSURE RECORD
Ended record
This closure record has ended. Use the current status pages for active road work and upcoming closures.
★ Quick facts
- Location
- At 401
- Start date
- Mon, Aug 17, 2026 · 11:59 PM
- End date
- Fri, Aug 21, 2026 · 5:00 AM
- Lanes affected
- ALL LANES CLOSED
- Severity
- HeavyFull ramp closure
- Source
- Ontario 511Event ID 286307
Traffic context
Traffic on Mon, Aug 17, 2026
This closure is one part of the day. The daily brief shows the event load, other road work, and the likely busy window from the same calendar data.
- Day status
- Plan ahead
- Busy window
- 11 PM to 6:30 AM
- Main signal
- TTC Line 1 (Yonge-University)
- TTC Line 1 (Yonge-University)
What's affected
HWY 400 (Southbound) at 401 is impacted by a full ramp closure. The source lists affected lanes as: ALL LANES CLOSED.
Corridors to compare: Highway 27 and Yonge Street run north–south south of King City; both are surface corridors with signals and local access. Which one wins depends on the day — check a live map before you leave.
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Plan ahead
Read next
★ RoadHighway 400 statusSegment-level closures, long-running restrictions, and upcoming work.read →★ DayTraffic on Aug 17Same-day events and other road restrictions around this closure.read →★ ClosuresToronto closures todayBrowse active and upcoming construction records.read →★ WeekendThis weekend's closuresSee this closure beside events, transit work, and other road restrictions.read →